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Finding the Fourth Proportional to 492,265.38, 679,388.02 and 288,394.08

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Solution

The fourth proportional to 492,265.38, 679,388.02 and 288,394.08 is: 398,020.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,265.38 : 679,388.02 = 288,394.08 : x
  2. Step 2: Convert to fraction form
    492,265.38/679,388.02 = 288,394.08/x
  3. Step 3: Cross multiply
    492,265.38x = 679,388.02 × 288,394.08
  4. Step 4: Simplify right side
    492,265.38x = 195,931,482,990.92
  5. Step 5: Solve for x
    x = 195,931,482,990.92/492,265.38
  6. Step 6: Final answer
    x = 398,020.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.